diet and excersize my dear... i know it's so boring to hear that, but it's the best way. and don't expect quick results either, your body doesn't even start letting go of stored fat until the 6th week after birth (for baby's sake). So just relax and take it easy for the frist while, then get out and walk, run or do whatever it is that makes you happy. And crunches until you feel like you're going to implode.